spi: spi_ll_stm32: (fix) Clear OVR bit condition
spi: spi_ll_stm32: (fix) Clear OVR bit condition

The OVR condition in the Status Register requires a
particular sequence in order to be cleared. If not
done properly it stays set forever.

Signed-off-by: Armando Visconti <d93ca24ded08d03c3aa60af6d2fd0eb7ce54da11@st.com>

ldts/zephyr,punitvara/zephyr,finikorg/zephyr,nashif/zephyr,GiulianoFranchetto/zephyr,zephyriot/zephyr,nashif/zephyr,nashif/zephyr,mbolivar/zephyr,galak/zephyr,finikorg/zephyr,kraj/zephyr,kraj/zephyr,GiulianoFranchetto/zephyr,ldts/zephyr,explora26/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,mbolivar/zephyr,Vudentz/zephyr,kraj/zephyr,zephyrproject-rtos/zephyr,punitvara/zephyr,nashif/zephyr,zephyrproject-rtos/zephyr,kraj/zephyr,galak/zephyr,ldts/zephyr,zephyriot/zephyr,explora26/zephyr,nashif/zephyr,mbolivar/zephyr,zephyriot/zephyr,mbolivar/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,Vudentz/zephyr,ldts/zephyr,punitvara/zephyr,Vudentz/zephyr,explora26/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,zephyriot/zephyr,galak/zephyr,kraj/zephyr,zephyriot/zephyr,GiulianoFranchetto/zephyr,GiulianoFranchetto/zephyr,explora26/zephyr,Vudentz/zephyr,GiulianoFranchetto/zephyr,punitvara/zephyr,finikorg/zephyr,mbolivar/zephyr,galak/zephyr,Vudentz/zephyr,punitvara/zephyr,explora26/zephyr,Vudentz/zephyr,ldts/zephyr